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In extended technicolor (ETC) theories, while the sideways ETC boson exchangedecreases the width $\Gamma_b \equiv \Gamma (Z\rightarrow b \bar{b})$, theflavor-diagonal ETC boson exchange tends to increase it, and the ETC-corrected$R_b \equiv \Gamma_b / \Gamma_{\mbox{\footnotesize had}}$ value could agreewith recent measurements. The $\tau$ asymmetry parameter may also increase in away consistent with experiment. The weak-interaction $\rho$ parameter receivesa correction from diagonal ETC exchange which is just barely acceptable byexperiments.Comment: importance of the rho parameter constraint included, version appeared  in PRL 74 4137 (1995

Nonoblique Corrections in Technicolor Theories Revisited